Solving Non-Linear Simultaneous Equations (Line and Parabola)

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y = xx - 2x - 3 , y = 2x - 3 .
* 3 = 3x1 , 3 - 1 = 2 = (b)
** 3 : 3x3 - 2x3 - 3
9 - 6 - 3 = 0
** 1 : 1x1 - 2x1 - 3
1 - 2 - 3 # 0
-1 : (-1x-1) -2(-1) - 3
1 + 2 - 3 = 0
*** x' = 3 , x" = -1 ./.